Signal-horn.



S. SCOGNAMiLLO.

SIGNAL HORN.

APPLICATION FILED SEPT. 5, 1913.

May 18, 1915.

Patent-ed .lTE

SALVATORE SCOGNAMILLO, OF NEXV YORK, N. Y.

sIonenI-ionn.

v To all whom it may concern:

Be it'known that I, SALVATORE SCOGNA- MILLO, a citizen of the Unite'dStates, residing at New York city, in the county of New York and State of New Yor have invented new and useful Improvements in Signal- Horns, of which the following is a specification.

My present invention relates to improve ments in Warning signals and. more espe cially to those adapted for use upon automobiles embodying a vibratory diaphragm or sonnd-prodncing medium and a revolnble toothed Wheel and electric motor for vibrat mg the diaphragm.

The primary ob ects of the invention are to provide an improved operating tooth or projection for the diaphragm whereby a motor of relatively large size and power can be accommodated Within a relatively small casing, and to provide an improved arrangement for the mounting of the actuating motor.

To these and other ends, the invention consists in certain improvements, and combinations and arrangements of parts, all as will be hereinafter more fully described, the novel featurcs being pointed out particularly in the claims at the end of the specification. v

In the accompanying drawing :Figure 1 represents longitudinal section through a signal horn embodying the present invention; Fig. 2 represents a section on the line 22 of Fig. 1; Fig. 3 is'a perspective view of a portion of the field magnet of the.

motor and the supporting arm therefor.

Similar parts are designated by the same refcrence characters in the several Views.

The present invention is applicable in general to electric horns or warning signals of different constructions that shown in the accompanylug drawing representing an e);- ample In this instance, 1 designates the flexible vibratory diaphragm which is clamped at its. periphery between the flange 2 of a hell or projector 3 and a ring 4;, screws,

or bolts 5 scrvingzto draw the parts to gether and to retain them in such relation. A cop-shaped clover or casing 6 is provided which serves to inclosc the motor and to Specification of Letters Patent.

through the wires 15.

protect the some from dust or injury, this casing or cover being removable to permit access to themotor. The forward edge of the removable cover or casing has a sliding it upon a flange I? which projects rearwardly from the ring e and it may be secured in position by screws, as shown;

motor Within the relatively small space available within the casing the motor, ac-

cording to the prescnt'invention, is mounted in substantially the center oi thecasing and is supported by a pair of lugs 8 which pro- Patented Meyii, 1e15,

Application filed September 5, 1913. Serial No. 788,336. i I

ject rearwardly at diametrically opposite points from the ring 4 The motor has a field 9 Which is preferably laminated or built up of number of punched plates Which are rivetedor otherwise secured. to

gether, this laminated construction providing' a field of the maximum magnetic strength" and efficiency. The two outer plates of the field are formed with outwardly projecting flanges 10, the lugs 8 on the ring 4 fitting against opposite sides of the field and between these flanges 10, thereby insuring a correct position of the motor relatively to the diaphragm, and screws 11 are tapped into the field of the motor and extend through slots 12 formed in the lugs 8, these screws being movable longitudinally in the slots and thereby affording an adjustment for the motor in a direction toward or from the diaphragm, thereby enabling the character of the soimdlproduced by the die phragin to be varied as desired. The motor field is energized as'usual by a. coii- 13. The motor is provided ,with an armature 1+2 which is revoluble between the field poles, and the armature and'field of the motor receive current from any suitable source In the present instance, the toothed wheel 'ldwhichseirvcs to mechanically vibrate the diaphragm is fixed on the armature shaft of the motor at one side of the field thereof. As the motor is located in substantially the center of the casing this toothed wheel occupies a position toward one side of the casing. In order to obtain the proper acoustic results from the diaphragm, the projection 01' tooth which cooperates with the toothed Wheel on the armature shaft to vibrate the diaphragm must be secured to the center of the diaphragm. The present invention provides a novel construction of tooth or projection, it comprising a body 17 which is secured to the center of the diaphragm by a rivet 18 or other suitable means and has a radial or laterally extending arm 19 which is spaced from or out of contact with the adjacent face of the diaphragm, the extremity of this arm being directed rearwardly and forming a tooth 20 to be engaged by the ratchet-shaped teeth of the toothed wheel 16. Rotation of the motor armature and consequently the toothed wheel 16 connected thereto produces rapid vibration of the diaphragm throughthe medium of the tooth or projection described, and the construction of the projection is such that the strength or quality of the tone produced by vibration of the diaphragm is not impaired nor is the vibration of the diaphragm hampered. The present invention enables a relatively large and strong motor to be used within a comparatively small casing, thereby insuring greater certainty in the operation of the device as a warning signal.

A novel and advantageous feature of the present invention is that the toothed actuating wheel for the diaphragm can be so set that when the motor is not energizedby the electric current the teeth of the toothed wheel only engage lightly or are just clear of the projection or tooth on the diaphragm, thereby enabling the motor to start revolving easily or freely when the current is sup-- I plied thereto, thus insuring certainty in the operation of the-signal. When the current is supplied to the motor. the field magnets thereof, owing to their close proximity to the diaphragm and the projection 19, will attract the center of the diaphragm toward them, the diaphragm being composed of magnetic metal, and this attraction of the diaphragm brings the actuating projection thereon into operative engagement with the bratory sound-producing diaphragm, an ac- 2. In a device of the class described, a vibratory sound produeing diaphragm, an actuating projection secured to the center of the diaphragm and having an arm extending radially in a direction parallel to the plane of the diaphragm but out of contact with the face thereof, the outer extremity of said projection being formed with an opcrating tooth, and an electric motor having a revoluble toothed wheel cooperative with said actuating tooth and having its field pieces straddling said projection.

3. In a signal of the class described, the combination with a motor having field pieces, an armature and a toothed wheel revoluble therewith, a vibratory sound-produoing diaphragm located opposite to the poles 'ofthe motor field pieces, and an actuating projection secured to the center of the diaphragm at a point between the poles of the end of said projection cotiperating with said toothed wheel.

4. In a signal of the class described, the I combination with a vibratory soundprodu cing diaphragm, a member having a pair of lugs extending in'parallelism therefrom, a

motor having an armature provided with a toothed wheel to operate the diaphragm and having a field provided at opposite sides with pairs oflianges to slidably engage said lugs to position the motor relatively to the diaphragm.

5. In a signal of the class described, the combination with a vibratory sound-producing diaphragm, a member having a pair of lugs extending in parallelism therefrom, a motor having an armature provided with a toothed wheel to operate the diaphragm and having a field composed of assembled plates, the outer plates formed with. flanges adapted to cooperate with said lugs to position the motor and permit adjustment thereof in a direction toward or from the diaphragm.

6. In a signal of the class described, the

combination of a vibratory diaphragm, and,

an electric motor provided with a toothed wheel for vibrating the diaphragm and having a field operative to attract the diaphragm toward the toothed wheel.

7. In a signal of the class described, the combination of a vibratory diaphragm having an actuating projection, aneleetric mo- In testimony whereof I have heyeunto set tor, and a toothed wheel opposite to the promy hand in presence'of two subscrlbing wit= jection on the diaphragm and operative by nesses.

the motor, energization of the motor attract- SALVATORE SCOGNAMILLQ ing the diaphragm and moving the actuat- Witnesses: ing irojection thereon toward the toothed JOHN L. FLETCHER,

whee MARGARET E. DILLER; 

